!=
as in "variable != expression".
The "does not equal" comparison operator is used in comparison expressions. The expression returns true if the expression evaluates to a different value than that assigned to the variable, false otherwise. The comparison is numeric unless both sides evaluate as strings.
Example
if( $0(1 2) != / / ) break; # Ignore lines where position 1 and 2 are not spaces
Last modified date: 08/02/2023